Title:
DEVICE FOR FORMING FINISH-FORGING BLANK FOR FORGED CRANKSHAFT OF 4-CYLINDER ENGINE, AND METHOD FOR MANUFACTURING FORGED CRANKSHAFT OF 4-CYLINDER ENGINE USING SAID DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/129201
Kind Code:
A1
Abstract:
A forming device wherein: a movable journal mold (11U, 11B) is caused to move in an axial direction toward a fixed journal mold (10U, 10B) from a state in which the raw journal section (Ja) of a raw material (4) is held between the fixed journal mold (10U, 10B) and the movable journal mold (11U, 11B), and in which a pin mold (12) is applied to a raw pin part (Pa); and the pin mold (12) is caused to move in the same axial direction and in an eccentric direction. A weighted raw arm section (Aa) is thereby compressed from both sides in the axial direction, the thickness thereof being reduced to the thickness of the weighted arm section of the forged crankshaft. Pressure is applied to the raw pin part (Pa) in the eccentric direction, the degree of eccentricity thereof being raised to the degree of eccentricity of the pin part of the forged crankshaft.
Inventors:
OKUBO JUNICHI (JP)
TAMURA KENJI (JP)
YOSHIDA KUNIHIRO (JP)
TAMURA KENJI (JP)
YOSHIDA KUNIHIRO (JP)
Application Number:
PCT/JP2015/000735
Publication Date:
September 03, 2015
Filing Date:
February 18, 2015
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21K1/08; B21J5/08
Domestic Patent References:
| WO2012035663A1 | 2012-03-22 |
Foreign References:
| JP2012161819A | 2012-08-30 |
Other References:
See also references of EP 3112045A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
アセンド patent business corporation (JP)
アセンド patent business corporation (JP)
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